期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP09(2022)164
关键词
Electroweak Precision Physics; Neutrino Interactions; Non-Standard Neutrino Properties; Specific BSM Phenomenology
资金
- research grant The Dark Universe: a Synergic Multimessenger Approach under the program PRIN 2017 - Ministero dell'Istruzione, Universita e della Ricerca (MIUR) [2017X7X85K]
- National Natural Science Foundation of China [12075255, 12075254, 11835013]
- Key Research Program of the Chinese Academy of Sciences [XDPB15]
- China Postdoctoral Science Foundation [2021T140669]
By studying coherent elastic neutrino-nucleus scattering, we reexamine the limits on neutrino magnetic moments, charge radii, millicharges, and weak mixing angle. We also consider the contribution of elastic neutrino-electron scattering, and provide updated measurements and limits on the weak mixing angle and neutrino electromagnetic properties.
Coherent elastic neutrino-nucleus scattering (CE nu NS) represents a powerful tool to investigate key electroweak physics parameters and neutrino properties since its first observation in 2017 by the COHERENT experiment exploiting the spallation neutron source at Oak Ridge National Laboratory. In light of the recent detection of such a process with antineutrinos produced by the Dresden-II reactor scattering off a germanium detector, we revisit the limits so far set on the neutrino magnetic moments, charge radii and millicharges as well as on the weak mixing angle. In order to do so, we also include the contribution of elastic neutrino-electron scattering, whose effect becomes non negligible in some beyond the Standard Model theories. By using different hypotheses for the germanium quenching factor and the reactor antineutrino flux, we provide a measurement of the weak mixing angle at the low-energy scale of the Dresden-II reactor experiment and, thanks to a combined analysis with the latest cesium iodide and argon data set released by the COHERENT Collaboration, we deliver updated limits for the neutrino electromagnetic properties. Interestingly, we are able to set a new best upper limit on the electron neutrino charge radius and significantly improve the other CE nu NS-related limits on the neutrino electric charge and magnetic moment.
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